The rare form of the fangirl interested in celebrities and fictional characters as well as "geek cultures" (Doctor Who, Star Trek, etc.) If you find a fanboy you should contact the nearest fangirl immediately, as they are an endangered species.
"Hey check out my David Tennant trench coat, I got it for coaplaying this weekend!"
"Dude, I didn't know you were a fanboy!"
by Aim Hemmings July 13, 2015

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1. One who is extremely emotionally attached to a particular hobby, game or game system, movie, comic book character, musician and their music to the point of absolute obsession.

2. Excessively favorable approval of something by a fan to the point where it receives excessive praise and said person will seek to ridicule anyone who disagrees with their point of views.

3. If a particular media is a classic and then is reinterpreted by another artist at some point in the future, obsession with classic rendition may lead to excessively and unnecessarily bash and ridicule said artist and anyone who appreciates the new interpretation more than the classic one.
Examples:

1. Michael Jordan fanboy has owned or does own every single magazine, poster, trading card, and pair of sneakers he's ever participated in or released. Several signed pictures are evident on the walls of his bedroom and overpriced Jordan sneakers he can't afford are on his feet. May even shave head and wear jersey while out playing basketball with friends and believe he can 'be like Mike'.

2. Led Zeppelin fanboy believes they are the greatest band ever and Jimmy Page is the greatest guitarist ever and will fight with, ridicule, and yell out expletives to someone who says Van Halen is the best band ever or Eddie Van Halen is the best guitar player ever. Also, fanboy will not and cannot like Van Halen or Eddie Van Halen because of this and may even lose friendships over it.

3. Life long Superman fanboy watches Superman Returns for the first time and claims that it's no where near as good as Superman: The Movie was and Brandon Routh is no where near as good as Christopher Reeve was. Fan feels cheated and will ridicule the film to no end with anyone who disagrees and believes Superman Returns was a good movie. Will then list several reasons why he/she believes so for reasons that most people didn't even notice or care about.
by Jake Brasco April 12, 2008

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a Fanboy seems originally a term applied to anyone into comic books, sci-fi, or other 'odd' hobbies. Now fanboy is typically reserved for over the top fans of comic books that dress as their favorite heros, and star wars fans, who seem to do the same.
I wasn't about to wait in line for five hours to see the new star wars film, not with all those fanboys standing there in their stormtropper costumes!
by Shojo Supuun December 03, 2004

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A boy who is a massive fan of music, musicians, sport, game, movie or a TV show.
He is such a fanboy of Iggy Azalea, Nicki Minaj and Kesha.
by Kesha is Queen January 10, 2015

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A person who is a fan of a particular game, brand, band, movie or any part of popular culture to the point where it becomes a way of life for them. Arguing with a fanboy is ultimately futile, as no matter how many well-articulated facts you put to them that may criticize said game, band etc. they will take it as an insult, almost as if you're insulting their child. DO NOT, under any circumstances, engage a fanboy in an intelligent discussion regarding the flaws of their favored hobbies as it will only result in one-sided arguments that you have no chance of winning.
Fanboy: I believe that Halo is one of the most amazing games to grace this earth.
Level-minded individual: Well it's not all that good, certainly not the way you're making it out to be.
Fanboy: How dare you! You're nothing more than a troll to disrespect this work of art. Go back to your cave....
(continues ranting on for 5 pages)
by Assassin Strike November 06, 2009

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1. (Noun) A rare species akin to fangirls but of the opposite gender.

2. (Verb) What a person of the male gender does when they get feels. E.g. flailing, squealing.
1. Liam is a huge fanboy.

2. He fanboyed so hard he could barely breath.
by Ndjcnskskvk May 13, 2016

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A person who is overly obsessed with a certain company or franchise and will defend it from any person who dislikes it no matter what. To see a person that likes a company or franchise, but isn't completely obsessed with it, see fan.
Two friends are having a conversation at the mall.
Friend 2: Dude, have you seen the latest Smosh video?
Friend 1: Nah. I used too like Smosh, but now they're just recycling jokes to make more money.
*Another guy hears Friend 1's complaints and runs up to him*
Guy: SMOSH ISN'T RECYCLING JOKES!!! THEY'RE STILL ORIGINAL AND WILL BE MORE SUCCESSFUL THAN YOU'VE EVER BEEN IN YOUR LIFE, YOU IGNORANT JERK!
*The guy runs away from the two friends, screaming and yelling*
Friend 2: Yeesh, what a fanboy.
Friend 1: Yeah, he was so butthurt. At least I'm not as fanboyish as hi- OH MY GOD IS THAT A NEW POKEMON GAME? I LOVE POKEMON!
Friend 2: I don't know why I'm your friend.
by ThatPyro August 08, 2015

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